A 50-year-old man was attacked with a sharp object at Gafanha de Aquém in Ílhavo on Saturday morning at about 9.30 pm.
The suspects of the crime at dawn pointed out a brother of the victim, with whom she lives and who has a criminal record.
The attack was caused by family quarrels and it is unknown whether it happened in their home or on the public road, but Ill firing firefighters eventually found the victim on the sidewalk, next to a bakery.
In severe condition, the man was transported to the Aveiro hospital with injuries in the back. The GNR took care of the incident.